The Rocstor Rocbolt® N19 series Premium and Heavy-Duty 4-Digit Resettable Combination Cable Lock is designed to work with HP® & Dell® devices with Nano Shaped Slots. Rocbolt security combination locks provide an exceptional asset security for your devices and helps to reduce theft. It is built with heavy duty Zinc Alloy Steal with a 5mm cable thickness. They are tested for torque/pull, foreign implements, lock lifecycle, corrosion, key strength, and other environmental conditions. Nearly thousands of notebooks and other portable devices are stolen everyday - protect your valuable assets by using the heavy-duty Rocbolt cable combination lock system. The push-button design enables one-hand operation for easy installation. Rocstor's Rocbolt provides a strong and heavy-duty lock head system which prevents intruders tampering with the lock. Rocbolt lock comes with a preset combination which can be easily reset and provides a 6ft galvanized heavy-duty steel cable. Rocbolt security cables are affordable and have three (3) years of warranty.